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I agree. It should explain the three options:
help(object): help on object or class of object, except
help('name'): help on object/module named 'name'
help(): run utility, which starts with utility help
help(help) prints unhelpful
"Help on _Helper in module site object:
class _Helper(builtins.object)
 | Define the builtin 'help'.
 | This is a wrapper around pydoc.help (with a twist).
 | 
 | Methods defined here:
...
"
which says not at all how to use help().
I have the feeling that there is a related issue on the tracker, but searching for 'help', 'help()', or 'help(help)' all return 620 hits.